20440431133 has 2 divisors, whose sum is σ = 20440431134. Its totient is φ = 20440431132.

The previous prime is 20440431127. The next prime is 20440431139. The reversal of 20440431133 is 33113404402.

It is a balanced prime because it is at equal distance from previous prime (20440431127) and next prime (20440431139).

It can be written as a sum of positive squares in only one way, i.e., 20301120324 + 139310809 = 142482^2 + 11803^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440431133 - 2²⁵ = 20406876701 is a prime.

It is a super-2 number, since 2×20440431133² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20440431098 and 20440431107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440431139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220215566 + 10220215567.

It is an arithmetic number, because the mean of its divisors is an integer number (10220215567).

Almost surely, 2^20440431133 is an apocalyptic number.

It is an amenable number.

20440431133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440431133 is an equidigital number, since it uses as much as digits as its factorization.

20440431133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20440431133 its reverse (33113404402), we get a palindrome (53553835535).

The spelling of 20440431133 in words is "twenty billion, four hundred forty million, four hundred thirty-one thousand, one hundred thirty-three".